com.jcabi.dynamo

Class QueryValve

java.lang.Object

com.jcabi.dynamo.QueryValve

All Implemented Interfaces:

Valve

@Immutable
@Loggable(value=1)
public final class QueryValve
extends Object
implements Valve

Query-based valve.

Version:

$Id$

Author:

Yegor Bugayenko (yegor@tpc2.com)

Constructor Summary

Constructors

Constructor and Description
QueryValve() Public ctor.

Method Summary

Methods

Modifier and Type	Method and Description
Dosage	fetch(Credentials credentials, String table, Map<String,com.amazonaws.services.dynamodbv2.model.Condition> conditions, Collection<String> keys) Fetch the first dosage.
QueryValve	withAttributesToGet(String... names) With these extra attributes to pre-fetch.
QueryValve	withAttributeToGet(String name) With this extra attribute to pre-fetch.
QueryValve	withLimit(int lmt) With given limit.
QueryValve	withScanIndexForward(boolean fwd) With scan index forward flag.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

QueryValve

public QueryValve()

Public ctor.

Method Detail

fetch

public Dosage fetch(Credentials credentials,
           String table,
           Map<String,com.amazonaws.services.dynamodbv2.model.Condition> conditions,
           Collection<String> keys)

Fetch the first dosage.

Specified by:

fetch in interface Valve

Parameters:

credentials - Credentials to AWS

table - Table name

conditions - Conditions

keys - Keys of the table

Returns:

Dosage

Suppressed Checkstyle violations:

ParameterNumber (5 lines)

withLimit

public QueryValve withLimit(int lmt)

With given limit.

Parameters:

lmt - Limit to use

Returns:

New query valve

withScanIndexForward

public QueryValve withScanIndexForward(boolean fwd)

With scan index forward flag.

Parameters:

fwd - Forward flag

Returns:

New query valve

withAttributeToGet

public QueryValve withAttributeToGet(@NotNull(message="attribute name can\'t be NULL")
                            String name)

With this extra attribute to pre-fetch.

Parameters:

name - Name of attribute to pre-load

Returns:

New query valve

withAttributesToGet

public QueryValve withAttributesToGet(String... names)

With these extra attributes to pre-fetch.

Parameters:

names - Name of attributes to pre-load

Returns:

New query valve